Jyeshta month, or Jyeshta maas or Jyeshta masam (May-June-July) is the third month in traditional Hindu lunar calendar. In 2013, Jyeshta month begins on May 26 and end on June 23 as per North Indian Hindu calendars. In other lunar calendars followed in Maharashtra, Gujarat, Karnataka, and Andhra Pradesh, Jyeshta mahina in 2013 starts on June 9 and ends on July 8.
Jyeshta is also one of the 27 nakshatras in Hindu Astrology. Jyeshta month falls when Purnima or Full Moon day (or before or after a day or couple) of the month coincides with Jyeshta nakshatra.
Amavasya in Jyeshta Month is Shani Jayanti (as per North Indian Hindi calendar). Falharini Kali Puja is also observed on Jyeshta Amavasya. Rambha Vrat (Rambha Tritiya Vrata), Aranya Sashti (Vindhya Vasini Puja / Vanagauri Puja), Mela Kshirbhavani in Kashmir, Ganga Dashara Ganga Pujan & Vat Savitri Vrat (Vat Purnima Vrat) are observed in Jyeshta Month.
The next month in Hindu Panchangam is Ashad month or Ashadh mahina or Ashad maas.
In 2012, Jyeshta month begins on May 6 and end on June 4 as per North Indian Hindu calendars. In other lunar calendars followed in Maharashtra, Gujarat, Karnataka, and Andhra Pradesh, Jyeshta mahina in 2012 starts on May 21 and ends on June 19.